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MaRussiya [10]
3 years ago
8

If the sum of a number and four is multiplied by two, the result is 28. What is the number?

Mathematics
2 answers:
Marta_Voda [28]3 years ago
7 0

Answer:

10

Step-by-step explanation:

The sum of a number and 4 is multiplied by 2, and the result is 28. In other words, letting the unknown number be x:

2(x+4)=28

Solve for x. Divide both sides by 2:

x+4=14

Subtract 4 from both sides:

x=10

So, our unknown number is 10.

And we're done!

JulijaS [17]3 years ago
4 0

Answer:

10

Step-by-step explanation:

Let the required number be x

2(x+4) =28

x + 4 = 28/2

x + 4 = 14

x = 14 - 4

x = 10

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Simplify:<br><br> 5(6h – 1) – 5h<br> A. h – 1<br> B. h – 5<br> C. 25h – 5<br> D. 35h – 5
pickupchik [31]

Answer:

C. 25h – 5

Step-by-step explanation:

5(6h - 1) - 5h = 30h - 5 - 5h = 25h - 5

4 0
3 years ago
Read 2 more answers
Mr. and Mrs. Rivers left their house at 10:00 a.m. driving in opposite directions. Mr. Rivers drove at an average speed of 48 mp
Orlov [11]

Answer:

42 miles.

Step-by-step explanation:

It is given that Mr. and Mrs. Rivers left their house at 10:00 a.m. driving in opposite directions.

Speed of Mr. Rivers = 48 mph

Speed of Mrs. Rivers = 36 mph

We need to find the distance between them at 10:30 a.m.

10:30 - 10:00 = 0:30 = 30 minutes = 1/2 = 0.5 hour

Distance covered by Mr. Rivers in half hour = 48 × 0.5 = 24

Distance covered by Mrs. Rivers in half hour = 36 × 0.5 = 18

Total distance covered by both in half hour = 24 + 18 = 42

Therefore, they are 42 miles far from each other at 10:30 a.m.

4 0
3 years ago
What is 6 divided by 3999 divided by 10021
Dvinal [7]

Answer:

0.00000014972309

Step-by-step explanation:

6/3999=0.00150037509

0.00150037509/10021=  0.00000014972309

hope this helps

4 0
3 years ago
Using front-end estimation, find a reasonable estimate of:
Citrus2011 [14]

Answer:

21,000

Step-by-step explanation:

front end estimation requires you to take the front / first digit of each number in this expression and round.

if you don't know how to round, basically you take the next digit after the first one, (in 719 you take the 1) and determine if that's below or above 5. If below, then keep the original first number. If above, add one more to the first digit. If the number is five itself, it is most common to round up (so add one).

like 425 would round to just 400; and 676 would round to 700.

multiply  700 and 30

youd get 21000

5 0
2 years ago
Read 2 more answers
Compute x/y if
Ivenika [448]

Answer:

Y = 1/4x-1

X = 4y-1

Step-by-step explanation:

layout the equations :

x+1/y = 4        y+1/x = 1/4

solve the equations, remember to switch sides switch signs solving the equations will give us the value of the letter

x+1/y = 4

x+1 = 4y

x=4y-1

***

y+1/x = 1/4

y+1  = 1/4x

y = 1/4x-1

4 0
2 years ago
Read 2 more answers
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